Write a Java program that prompts the user for an int n. You can assume that 1 ≤ n ≤ 9. Your program should use embedded for loops that produce the following output: 1 2 1 3 2 1 4 3 2 1 5 4 3 2 1 . . . n . . . 5 4 3 2 1 Your prompt to the user should be: Please enter a number 1...9 : Please note that your class should be named PatternTwo.

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mahamnasir mahamnasir · Answer 1 · 2020-09-16T13:43:01+02:00

Answer:

Here is the JAVA program:

import java.util.Scanner; // to take input from user

public class PatternTwo{ //class name

public static void main(String args[]){ //start of main function

Scanner scan = new Scanner(System.in); // creates Scanner class object

System.out.print("Please enter a number: "); //prompts user to enter an int n for the number of rows

int n = scan.nextInt(); //reads and scans the value of n from user

int i, j; //declares two variables to iterate through i rows and j columns

for (i=1; i<=n; i++){ //outer loop for rows

for (j=2*(n-i); j>=1; j--){ //inner loop for space between numbers in pattern

System.out.print(" "); } //displays an empty space in the pattern

for (j = i; j >= 1; j--) { //inner loop for columns

System.out.print(j+" "); } //prints the value of j (prints numbers in reverse)

System.out.println(); } } } //prints a new line after printing each row

Explanation:

The program is explained with an example in the attached document.